matiex | 7158c2ece09b5059a43e7609391eaa8cb4c9d383351f0129da5dea7fe1864580

General

Target

IRS NOTICE LETTER.exe

Score

10^/10

matiex keylogger spyware stealer

Malware Config

Extracted

Family

matiex

Credentials

Protocol: smtp
Host:
ckfashion.shop
Port:
26
Username:
matiex@ckfashion.shop
Password:
123Mat+++

Signatures

Matiex
Matiex is a keylogger and infostealer first seen in July 2020.
stealer keylogger matiex

Matiex Main Payload 16 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2628-16-0x0000000000400000-0x0000000000476000-memory.dmp	family_matiex
behavioral2/memory/2628-17-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-27-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-28-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-29-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-32-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-31-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-33-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-34-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-30-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-36-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-37-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-38-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-39-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-40-0x000000000047083E-mapping.dmp	family_matiex
behavioral2/memory/2628-35-0x000000000047083E-mapping.dmp	family_matiex

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

8 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

IRS NOTICE LETTER.exe

description pid process target process

PID 636 set thread context of 2628 636 IRS NOTICE LETTER.exe IRS NOTICE LETTER.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3980 2628 WerFault.exe IRS NOTICE LETTER.exe
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

2276 schtasks.exe

flow	ioc
8	checkip.dyndns.org

description	pid	process	target process
PID 636 set thread context of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe

pid	pid_target	process	target process
3980	2628	WerFault.exe	IRS NOTICE LETTER.exe

pid	process
2276	schtasks.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

IRS NOTICE LETTER.exeWerFault.exe

pid	process
636	IRS NOTICE LETTER.exe
636	IRS NOTICE LETTER.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe
3980	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

IRS NOTICE LETTER.exeIRS NOTICE LETTER.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	636	IRS NOTICE LETTER.exe
Token: SeDebugPrivilege	2628	IRS NOTICE LETTER.exe
Token: SeRestorePrivilege	3980	WerFault.exe
Token: SeBackupPrivilege	3980	WerFault.exe
Token: SeDebugPrivilege	3980	WerFault.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

IRS NOTICE LETTER.exe

description	pid	process	target process
PID 636 wrote to memory of 2276	636	IRS NOTICE LETTER.exe	schtasks.exe
PID 636 wrote to memory of 2276	636	IRS NOTICE LETTER.exe	schtasks.exe
PID 636 wrote to memory of 2276	636	IRS NOTICE LETTER.exe	schtasks.exe
PID 636 wrote to memory of 2600	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2600	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2600	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe
PID 636 wrote to memory of 2628	636	IRS NOTICE LETTER.exe	IRS NOTICE LETTER.exe

C:\Users\Admin\AppData\Local\Temp\IRS NOTICE LETTER.exe
"C:\Users\Admin\AppData\Local\Temp\IRS NOTICE LETTER.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:636

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DhRDIyd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp468F.tmp"
2⤵
- Creates scheduled task(s)
PID:2276

C:\Users\Admin\AppData\Local\Temp\IRS NOTICE LETTER.exe
"C:\Users\Admin\AppData\Local\Temp\IRS NOTICE LETTER.exe"
2⤵
PID:2600

C:\Users\Admin\AppData\Local\Temp\IRS NOTICE LETTER.exe
"C:\Users\Admin\AppData\Local\Temp\IRS NOTICE LETTER.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2628 -s 1632
3⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3980

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\IRS NOTICE LETTER.exe.log
MD5
90acfd72f14a512712b1a7380c0faf60

SHA1
40ba4accb8faa75887e84fb8e38d598dc8cf0f12

SHA256
20806822f0c130b340504132c1461b589261fbbc518e468f4f90733ab514cb86

SHA512
29dbf85e14e60868574cb4dc9bda83d3c229fb956733d8d2557f2475ee0e690ac9c2e72f31e02284996da6906ba2dbfa382a29b04c15a2406571d8ee19ad16b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp468F.tmp
MD5
60360f10a4a3d04263734c468a149b3b

SHA1
871df8b6a99f8db8f37f1263746e322045825e55

SHA256
89c73e48dd4b298191eaad92713bcedcb8108399dd2dc41c275c5a4d288b150e

SHA512
006ec156a1022b8ae6324940d31b695266b76ed272ef5a721ab077f9d767f3a43ea7688af8c2ac1ac5c90b9b1d25221e517d2a88852ccde74ba3fa1315e9723a

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memory/636-11-0x0000000005A40000-0x0000000005AB7000-memory.dmp

Filesize
476KB

Download
memory/636-3-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/636-7-0x0000000004D40000-0x0000000004D41000-memory.dmp

Filesize
4KB

Download
memory/636-12-0x00000000057F0000-0x00000000057F6000-memory.dmp

Filesize
24KB

Download
memory/636-9-0x0000000004EA0000-0x0000000004EA1000-memory.dmp

Filesize
4KB

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memory/636-10-0x0000000004D10000-0x0000000004D24000-memory.dmp

Filesize
80KB

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memory/636-2-0x00000000739E0000-0x00000000740CE000-memory.dmp

Filesize
6.9MB

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memory/636-8-0x0000000004BB0000-0x0000000004BB1000-memory.dmp

Filesize
4KB

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memory/636-13-0x0000000005AE0000-0x0000000005B52000-memory.dmp

Filesize
456KB

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memory/636-6-0x00000000051A0000-0x00000000051A1000-memory.dmp

Filesize
4KB

Download
memory/636-5-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

Filesize
4KB

Download
memory/2276-14-0x0000000000000000-mapping.dmp

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memory/2628-37-0x000000000047083E-mapping.dmp

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memory/2628-38-0x000000000047083E-mapping.dmp

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memory/2628-31-0x000000000047083E-mapping.dmp

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memory/2628-34-0x000000000047083E-mapping.dmp

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memory/2628-33-0x000000000047083E-mapping.dmp

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memory/2628-35-0x000000000047083E-mapping.dmp

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memory/2628-19-0x00000000739E0000-0x00000000740CE000-memory.dmp

Filesize
6.9MB

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memory/2628-28-0x000000000047083E-mapping.dmp

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memory/2628-29-0x000000000047083E-mapping.dmp

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memory/2628-32-0x000000000047083E-mapping.dmp

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memory/2628-16-0x0000000000400000-0x0000000000476000-memory.dmp

Filesize
472KB

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memory/2628-40-0x000000000047083E-mapping.dmp

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memory/2628-24-0x0000000005450000-0x0000000005451000-memory.dmp

Filesize
4KB

Download
memory/2628-30-0x000000000047083E-mapping.dmp

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memory/2628-36-0x000000000047083E-mapping.dmp

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memory/2628-17-0x000000000047083E-mapping.dmp

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memory/2628-27-0x000000000047083E-mapping.dmp

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memory/2628-39-0x000000000047083E-mapping.dmp

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memory/3980-26-0x00000000046B0000-0x00000000046B1000-memory.dmp

Filesize
4KB

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memory/3980-25-0x00000000042B0000-0x00000000042B1000-memory.dmp

Filesize
4KB

Download
memory/3980-41-0x0000000004AB0000-0x0000000004AB1000-memory.dmp

Filesize
4KB

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads